﻿// Copyright (c) 2010 Dan Popick

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Open.Web.Stijl
{
	/// <summary>
	/// Specific tiling behavior for the HttpHandler
	/// </summary>
	class HandlerTileEngine: TileEngine
	{
		/// <summary>
		/// Generates the URL for the image. Must be overridden based on the context (handler/task)
		/// </summary>
		/// <param name="imageIndex">An index for the image, unique for each CSS file.</param>
		/// <param name="image">The tiled image reference.</param>
		/// <returns>The path to the image to be rendered out to the updated CSS file</returns>
		/// <remarks>
		/// In the context of the HttpHandler, we generate the URLs for the images as calls
		/// to the CSS file plus a query string with the tiled image's unique image index
		/// </remarks>
		protected override string GenerateUrl(int imageIndex, TiledImage image)
		{
			return String.Format("{0}?n={1}", System.Web.HttpContext.Current.Request.Url.AbsolutePath, imageIndex);
		}
	}
}
